|
What platform? Do the images show up in Preview? Are you sure you are not confusing 1.JPG with 1.jpg? Those are different files in the epub's manifest which is inside Sigil's content.opf.
One way to get a better error message is to use Doitsu's wonderful epubcheck plugin for Sigil to see what that validator actually says.
Also opening a content.opf Tab via Sigil's BookBrowser and snapping a screenshot of the manifest section and posting it here may help.
|